Coil unit



FIG. 1 is a perspective view of a coil unit;

FIG. 2 is a front elevation view, with the rear elevation view being a mirror image of the front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right-side view thereof; and,

FIG. 6 is a left-side view thereof. 

CLAIM The ornamental design for a coil unit, as shown and described. 